Well, the Hijri date 11 Rajab 1400 corresponds to the Gregorian date Sunday, 25 May 1980. This date lies in the seventh month of the Hijri year 1400 AH, which is Rajab of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1400/07/11 is calculated using the Umm Al-Qura calendar and the sighting of the moon. One thing to remember is that this Arabic date may occur on different Gregorian date depending upon the region and country and obviously the moon.
If you are still not sure about the date then you can use our Arabic date converter.
The following is the conversion of the Gregorian date 25 May 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Rajab 1400 AH to its equivalent Gregorian date.
فَكَيْفَ إِذَا تَوَفَّتْهُمُ ٱلْمَلَٰٓئِكَةُ يَضْرِبُونَ وُجُوهَهُمْ وَأَدْبَٰرَهُمْ
Then how (will it be with them) when the angels gather them, smiting their faces and their backs!
Surah Muhammad(47:27)
Sahih al-Bukhari
Fighting for the Cause of Allah (Jihaad)
Chapter: The Jihad of women
Narrated `Aisha:
the mother of the faithful believers, I requested the Prophet (ﷺ) permit me to participate in Jihad, but he said, "Your Jihad is the performance of Hajj."
Sahih al-Bukhari 2875